1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "krb5_locl.h" 35 36 /* 37 * Convert the simple string `s' into a NULL-terminated and freshly allocated 38 * list in `list'. Return an error code. 39 */ 40 41 static krb5_error_code 42 string_to_list (krb5_context context, const char *s, krb5_realm **list) 43 { 44 45 *list = malloc (2 * sizeof(**list)); 46 if (*list == NULL) { 47 krb5_set_error_message(context, ENOMEM, 48 N_("malloc: out of memory", "")); 49 return ENOMEM; 50 } 51 (*list)[0] = strdup (s); 52 if ((*list)[0] == NULL) { 53 free (*list); 54 krb5_set_error_message(context, ENOMEM, 55 N_("malloc: out of memory", "")); 56 return ENOMEM; 57 } 58 (*list)[1] = NULL; 59 return 0; 60 } 61 62 /* 63 * Set the knowledge of the default realm(s) in `context'. 64 * If realm != NULL, that's the new default realm. 65 * Otherwise, the realm(s) are figured out from configuration or DNS. 66 */ 67 68 KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL 69 krb5_set_default_realm(krb5_context context, 70 const char *realm) 71 { 72 krb5_error_code ret = 0; 73 krb5_realm *realms = NULL; 74 75 if (realm == NULL) { 76 realms = krb5_config_get_strings (context, NULL, 77 "libdefaults", 78 "default_realm", 79 NULL); 80 if (realms == NULL) 81 ret = krb5_get_host_realm(context, NULL, &realms); 82 } else { 83 ret = string_to_list (context, realm, &realms); 84 } 85 if (ret) 86 return ret; 87 krb5_free_host_realm (context, context->default_realms); 88 context->default_realms = realms; 89 return 0; 90 } 91